Electronics Forum | Tue Feb 04 09:03:45 EST 2003 | Russ Roberts
Greetings, I am pretty new to SMT production, and have learned much from this forum. I am getting ready to build a CCA with many 0402 parts that are really close together. I consider these fine pitch. The board also has two QFPS, so my stencil design
Electronics Forum | Wed May 22 12:39:06 EDT 2002 | pwrgroup
Hmmm... Why would you want to to this? I > understand your concern, but why not let your > stencil house manipulate your Gerber and send you > a copy of it before they cut a stencil? Saves > you time and money. Sit down with your stencil > m
Electronics Forum | Mon Apr 09 13:53:45 EDT 2018 | dleeper
I've never placed one of these before, but it looks like a poorly designed part. It has pads scattered asymmetrically around the body of the part. when it reflows this is going to apply uneven forces to the component, causing it to skew. I guess hav
Electronics Forum | Mon Apr 09 16:00:46 EDT 2018 | slthomas
Yes. I'm at a loss as to how to best approach this. I think the giant blob of solder is just going to behave more like a lubricant than anything else. The thing is, I would like to at least try the manufacturer's recommendation once (and this bui
Electronics Forum | Mon Mar 20 10:54:36 EST 2000 | Glenn Robertson
Jack - The last time I checked IBM was specifying a minimum of 4800 cubic mils of paste for each pad. This is required for acceptable reliability, not just to make the connection. There is no way you are getting that volume with a 5 mil stencil
Electronics Forum | Wed Feb 05 13:56:40 EST 2003 | davef
I figure if you need the rest, you don't need these. These strips are from some laser cutting tool fabricator. They give them to their customers [laser cut stencil fabricators] so the customer can do a good job. Yall have a nice day now, y'hear?
Electronics Forum | Sat Aug 22 16:16:13 EDT 2015 | davef
Comments are: * Read “Challenges for Step Stencil Printing” [Carmina Lantzsch, Georg Kleemann, LaserJob GmbH] http://www.smtnet.com/library/index.cfm?fuseaction=view_article&article_id=2096 * I want to say that IPC7525B [Oct 2011] improved the dis
Electronics Forum | Wed May 22 12:39:00 EDT 2002 | pwrgroup
and the two ratio is changed if you use different thickness sheet or step-down or step-up.I think real time calculator of the two ratio is very important for tranfer efficience.
Electronics Forum | Wed Feb 05 10:23:26 EST 2003 | russ
Are these the only packages that you could come up with Dave? What about all the rest? You're something else. Thanks for doing my work for me! Russ
Electronics Forum | Wed Feb 05 21:24:35 EST 2003 | davef
Stephen's correct. Radiased outer corners on 0402 pads really do seem to improve things. We aim to try "squared-up semicircles".
